Grooving-tool.



1. E. BURNS.

GROOVING TOOL. APPLICATION FILED DEC. 6. 1915.

v TED STATES r :rosnrn n. BURNS, or CANASTOTA, YORK.

T 0 all whom it may concern "*Be' it know ifthat 1 .1mm E. BURNS, a

citizen of the United States-of America, and resident ofCanastota, in the" county of Madison, in. the State'of-New- York, have invented new and useful Improvements in plurality of miter cutsin'glasswarel In this characterto'f toolsit' is quite essential to the production of'p'erfect miter cuts that the'cutting edgesnpon the alundum wheel should be absolutely parallel andiiri-iforn ily perfect in shape and'sizel Heretofore attempts have been tocutithe eircumferential grooves "or 'Initers in alundum wheels singly by diamond pointed orot-her tools, inwhichcase it is practicall'yimpossi- 'ble to make the cutting edgesparallel. It

has also been attempted to groovecarhorundum wheels by a tool having alternate grooves and continuous uninterrupted ridges, such tools having handles positioned upon opposite sides of the" wheel which the operator may grasp inholding the "cutting'wheel .againsta carborundum or emerywheel. --The latter'tool is not adapted for use with al'undumwheels, due" to the relative' hard- .ness and difli'culty of cutting such wheelsas distinguished" fromcarborundum or emery .Wheels, and in practice it is. found substantially impossible for. an operator to hold'the wheel absolutely true "and this is essential as even a slight tilting movement of the grinding wheel breaks off the cutting 'edges and destroys the shape and uniformity of the miters, and the slightest defect in the u t g ed es 9. lait e 12911 the lu dum Wheel produces in turn corresponding defects in the glass cut thereby. t

One of the objects, therefore, of this invention is to produce a tool that may rest securely upon a suitable rigid platform dur ing the cutting operation, whereby uniform and perfect cutting edges are produced upon the alundum wheel.

Another object resides in the production of a grooving tool that will form such cutfip qi q of tter Pat t- Patented Mar. 12, 1918. on iiied'nece' ter aiais; eria1No.65,437.

ting edges on wheels made of hard substances-,: such as al-undum, asthe known wheel having continuous ridges is practically useless for this purpose.

Other objects and uses will appear from the following description, taken in connection with the accompanying drawings, in wl1i'ch- 7 Figure 1 is a perspective view of the tool.

Fig-2 is a cross section on line 22, Fig; 1. Fig. 3 is a cross section on line 33, F ig. 1: I

Theinvention comprises a circular wheel .l*-hav'i'n-g a concavededge provided with a seiries of alternate circumferential grooves and cutting edges, of any size and any number desired, the cont'nuity of such grooves and cutting edges being interrupted at spaced points by grooves 2 extending across and around the Wheel and obliquely disposed with respect to'the grooves and ridges, thereby forming a series of allned cutting edges and alined grooves about the circumference of the wheel spaced by relatively-narrow obliquely di-posed channels.

9; The Wheel '1- 1s provided with bosses 3"proje'cting from opposite sides thereof, each boss provided with a laterally extending conical seator bearing for the reception of conical journals externally threaded and engaged with internally threaded portions of the side walls 5 of, a case forming portions of the supportingframework of the tool. Each of the bearings 4- is provided with a locking nut 7 for holding the journals .in a'ny position of adjustment. By tighteningthe journals and'adjusting them as desired, the wheel 1- will run perfectly true'and the cutting'edges formed upon the alundum or other wheel will in turn be uniforn'iand perfect.

"-The'supp'orting framework of the tool further comprises a bar -8 extending rearwardly from the case '6' and terminating in V-shaped downwardly diverging legs 9. The bottom of the legs -9 lies substantially in the same plane as the lower portion of the body of the case -6 to form spaced fiat supporting planes for the tool, and adapted to rest upon a suitable table indicated in dotted lines Fig. 2, and the side portions 5 are provided at their front portions with dethe grooving tool, as many pending projections 10- having their rear faces formed along straight lines and lying in the same plane and adapted to abut against the front edge of the supporting table, as shown in Fig. 2. By the supporting frame disclosed, associated with a'suitable table, the grooving tool is held rigidly in its initial position and all tilting and lateral movement of the tool is prevented, which latter movements render the tool practically useless.

The case -6- is provided with a hood -11- inclined upwardly therefrom and lying over the wheel -1- to prevent the abradant used or the particles of alundum from flying into the face of an operator.

In operation, the obliquely disposed channels 2 not only serve to carry 0 the particles of abradant, if used, and the particles of the alundum or other wheel being grooved, but they also serve to break up the continuity of the circumferential cutting edges on the wheel, forming abrupt, sharp cutting points at the opposite terminals of the elongated cutting edges, rendering the wheel capable of cutting miters in wheels formed of very hard material such as alundum.-

In certain respects, a wheel embodying the obliquely disposed channels is capable of. performingthe same character of cutting'as a toothed wheel and at the same time, due to the elongated nature of the cutting edges, is capable of forming smooth uniform miters which cannot be produced by toothed wheels. The wheel of this invention is, therefore, a distinct improvement over both the'toothed wheel and the wheel having continuous smooth cutting edges.

Preferably, the supporting framework, including the entire tool except the wheel -1- and journals -4, is formed of a single metallic casting, as shown, but I do not desire to limit myself to such formation or construction of the supporting framework, or to any particular shape, size or method of assemblage of the parts of changes may be made in the details of form, construction and arrangement while the invention and Gcples 01 this patent may be obtained for retaining the essence of without departing from five cents each. by

Washington, D. 0.

' the spirit of this invention as set forth in the V appended claims.

What I claim is 1. A device for grooving glass cutting stones comprising a wheel having a plurality of separate parallel forming ridges each ridge interrupted by a plurality of cross grooves forming a series of arcuate elongated smooth spaced grooving edges traveling in planes perpendicular to the axis of rotation of theiwheel and adapted to simultaneously form a plurality of alternate groovesand ridges upon a glass cutting stone, and means for rotatably supporting the wheel upon a stationary axis.

2. A device for grooving glass cutting stones comprising a rotatable wheel having a circumferential cutting edge lying in a plane perpendicular to the axis of the wheel, a case having a rear wall and side walls extending substantially radially of the aXis of the Wheel and having 1ournals for rotatably carrying the wheel, a plane surface formed at the base of the rear wall and the side Walls ofthe case and-at a point below the adjacent portion of the periphery of the wheel, an arm extending rearwardly from the rear wall and having aplane at its rear and lying in substantially the same plane as the plane surface formed at the base of the'rear wall and the side walls.

3. A device for grooving glass cutting stones comprising a rotatable wheel having a circumferential cutting edge lying in a planeperpen'dicularto the axis ofthe wheel, a case haVing-a'rear wall and side walls extending substantially radially of the axis of the wheel and having journals for rotatably carrying the wheel, a plane surface formed at the base of the rear wall and the side walls of the case and at a point below the adjacent portion of the periphery of the wheel, and a hood inclined upwardly over the wheel and connected to the rear" wall and'theadjacent portions of the side walls. 7

y In witness whereof I have hereunto set my hand this-29th day' of November, 1915.

. JOSEPH E. BURNS. Witnesses: E. A. THOMPSON,

M. VIOLA HOWLAND.

addressing the fcommissioner of latents, 

